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In Reply to: RE: tube cooler posted by Caucasian Blackplate on November 15, 2014 at 10:42:21
It is my understanding they extend tube life.My Carver C-19 powers the built-in phono pre section when the unit is powered regardless of whether the phono section is being used or not.
My intent is to preserve as much life as possible from the tubes I have in the phono section.
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Practicing Curmudgeon & Audio Snob
......just an 'ON' switch, Please!
Edits: 11/15/14Follow Ups:
There are indeed some tubes that are made to have some cooling assistance, with plate and grid posts sticking out of the glass and provisions for heat dissipating connectors to be applied there.
There are also tubes that tend to be run incredibly hot (EL84's seem to be the first that come to mind), where taking the glass temperature down would be sensible.
Th 6922 doesn't seem to fit this mold, and I can't even remember the last time I saw one red plate.
Then is it your opinion I fallen prey to the audio marketing charlatans?
My NOS Mullards are precious to me (I love what they do to sound of my system).....I just want them to last as long as possible.
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Practicing Curmudgeon & Audio Snob
......just an 'ON' switch, Please!
"Then is it your opinion I fallen prey to the audio marketing charlatans?"
Charlatans is not the correct word. Maybe Munchausens, if you want to stick with rather offending tones.
You are paying to get knowledge, that's it.
Silicone rings and similar gadgets might help when microphonics is an issue (sensitivity to vibration). Shields might help when fields cause problems. Each solution within material and magnitude limitations.
Tube coolers cannot help on glass tubes, since the anode (and the other elements) are in a vacuum. Cooling the glass envelope is not helping you to cool down the anode. Do some research on how heat can be transferred in vacuum, as opposed to air and liquids.
Some tubes are specifically designed to be cooled by air flow, and maximum anode dissipation can be increased by increasing the air flow.
You cannot extend the life of your glass tubes by improvimg the cooling, and in particular it is not applicable to small glass tubes used in preamps like the ECC series.
******
http://rh-amps.blogspot.com/
ecc88 ( 6922) does not get very hot, they should be fine without extra cooling. In fact tubes need app 100c to let the getter absorb gases.
"Too Cool" also crossed my mind.This link shows a thermal chart for the MCF-9 Pearl coolers that I just ordered.
BTW, thanks for all the advice, it is much appreciated.
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Practicing Curmudgeon & Audio Snob
......just an 'ON' switch, Please!
Edits: 11/15/14 11/15/14
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